| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | Kernel driver ucd9200 |
| 2 | ===================== |
| 3 | |
| 4 | Supported chips: |
| 5 | * TI UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and UCD9248 |
| 6 | Prefixes: 'ucd9220', 'ucd9222', 'ucd9224', 'ucd9240', 'ucd9244', 'ucd9246', |
| 7 | 'ucd9248' |
| 8 | Addresses scanned: - |
| 9 | Datasheets: |
| 10 | http://focus.ti.com/lit/ds/symlink/ucd9220.pdf |
| 11 | http://focus.ti.com/lit/ds/symlink/ucd9222.pdf |
| 12 | http://focus.ti.com/lit/ds/symlink/ucd9224.pdf |
| 13 | http://focus.ti.com/lit/ds/symlink/ucd9240.pdf |
| 14 | http://focus.ti.com/lit/ds/symlink/ucd9244.pdf |
| 15 | http://focus.ti.com/lit/ds/symlink/ucd9246.pdf |
| 16 | http://focus.ti.com/lit/ds/symlink/ucd9248.pdf |
| 17 | |
| 18 | Author: Guenter Roeck <linux@roeck-us.net> |
| 19 | |
| 20 | |
| 21 | Description |
| 22 | ----------- |
| 23 | |
| 24 | [From datasheets] UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and |
| 25 | UCD9248 are multi-rail, multi-phase synchronous buck digital PWM controllers |
| 26 | designed for non-isolated DC/DC power applications. The devices integrate |
| 27 | dedicated circuitry for DC/DC loop management with flash memory and a serial |
| 28 | interface to support configuration, monitoring and management. |
| 29 | |
| 30 | This driver is a client driver to the core PMBus driver. Please see |
| 31 | Documentation/hwmon/pmbus for details on PMBus client drivers. |
| 32 | |
| 33 | |
| 34 | Usage Notes |
| 35 | ----------- |
| 36 | |
| 37 | This driver does not auto-detect devices. You will have to instantiate the |
| 38 | devices explicitly. Please see Documentation/i2c/instantiating-devices for |
| 39 | details. |
| 40 | |
| 41 | |
| 42 | Platform data support |
| 43 | --------------------- |
| 44 | |
| 45 | The driver supports standard PMBus driver platform data. Please see |
| 46 | Documentation/hwmon/pmbus for details. |
| 47 | |
| 48 | |
| 49 | Sysfs entries |
| 50 | ------------- |
| 51 | |
| 52 | The following attributes are supported. Limits are read-write; all other |
| 53 | attributes are read-only. |
| 54 | |
| 55 | in1_label "vin". |
| 56 | in1_input Measured voltage. From READ_VIN register. |
| 57 | in1_min Minimum Voltage. From VIN_UV_WARN_LIMIT register. |
| 58 | in1_max Maximum voltage. From VIN_OV_WARN_LIMIT register. |
| 59 | in1_lcrit Critical minimum Voltage. VIN_UV_FAULT_LIMIT register. |
| 60 | in1_crit Critical maximum voltage. From VIN_OV_FAULT_LIMIT register. |
| 61 | in1_min_alarm Voltage low alarm. From VIN_UV_WARNING status. |
| 62 | in1_max_alarm Voltage high alarm. From VIN_OV_WARNING status. |
| 63 | in1_lcrit_alarm Voltage critical low alarm. From VIN_UV_FAULT status. |
| 64 | in1_crit_alarm Voltage critical high alarm. From VIN_OV_FAULT status. |
| 65 | |
| 66 | in[2-5]_label "vout[1-4]". |
| 67 | in[2-5]_input Measured voltage. From READ_VOUT register. |
| 68 | in[2-5]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. |
| 69 | in[2-5]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. |
| 70 | in[2-5]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. |
| 71 | in[2-5]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register. |
| 72 | in[2-5]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. |
| 73 | in[2-5]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. |
| 74 | in[2-5]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status. |
| 75 | in[2-5]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status. |
| 76 | |
| 77 | curr1_label "iin". |
| 78 | curr1_input Measured current. From READ_IIN register. |
| 79 | |
| 80 | curr[2-5]_label "iout[1-4]". |
| 81 | curr[2-5]_input Measured current. From READ_IOUT register. |
| 82 | curr[2-5]_max Maximum current. From IOUT_OC_WARN_LIMIT register. |
| 83 | curr[2-5]_lcrit Critical minimum output current. From IOUT_UC_FAULT_LIMIT |
| 84 | register. |
| 85 | curr[2-5]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register. |
| 86 | curr[2-5]_max_alarm Current high alarm. From IOUT_OC_WARNING status. |
| 87 | curr[2-5]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. |
| 88 | |
| 89 | power1_input Measured input power. From READ_PIN register. |
| 90 | power1_label "pin" |
| 91 | |
| 92 | power[2-5]_input Measured output power. From READ_POUT register. |
| 93 | power[2-5]_label "pout[1-4]" |
| 94 | |
| 95 | The number of output voltage, current, and power |
| 96 | attribute sets is determined by the number of enabled |
| 97 | rails. See chip datasheets for details. |
| 98 | |
| 99 | temp[1-5]_input Measured temperatures. From READ_TEMPERATURE_1 and |
| 100 | READ_TEMPERATURE_2 registers. |
| 101 | temp1 is the chip internal temperature. temp[2-5] are |
| 102 | rail temperatures. temp[2-5] attributes are only |
| 103 | created for enabled rails. See chip datasheets for |
| 104 | details. |
| 105 | temp[1-5]_max Maximum temperature. From OT_WARN_LIMIT register. |
| 106 | temp[1-5]_crit Critical high temperature. From OT_FAULT_LIMIT register. |
| 107 | temp[1-5]_max_alarm Temperature high alarm. |
| 108 | temp[1-5]_crit_alarm Temperature critical high alarm. |
| 109 | |
| 110 | fan1_input Fan RPM. ucd9240 only. |
| 111 | fan1_alarm Fan alarm. ucd9240 only. |
| 112 | fan1_fault Fan fault. ucd9240 only. |